I'm tempted to add an API to my web app, and create cool little things such as an AIR app, Facebook app, widgets for iGoogle, et al. even though there's been li

I'm tempted to add an API to my web app, and create cool little things such as an AIR app, Facebook app, widgets for iGoogle, et al. even though there's been little demand for an API. I'm wondering if creating all these things would extend the reach of my site, or should I not bother.